CVE-2025-8943 (GCVE-0-2025-8943)

Vulnerability from cvelistv5 – Published: 2025-08-14 09:54 – Updated: 2025-08-18 16:47
VLAI Previdian
Title
Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers
Summary
The Custom MCPs feature is designed to execute OS commands, for instance, using tools like `npx` to spin up local MCP Servers. However, Flowise's inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-14 13:36 UTC
CWE
  • CWE-306 - Missing Authentication for Critical Function
  • CWE-862 - Missing Authorization
Assigner
References
Impacted products
Vendor Product Version
Affected: 0 , < 3.0.1 (semver)
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: fd1dd494-3e0b-433d-bf78-e89e643352a8

Vulnerability ID: CVE-2025-8943

Status: Confirmed

Status Updated: 2026-08-05 10:45 CEST

Exploited: Yes

Timestamps
First Seen: 2026-08-05
Asserted: 2026-08-05
Scope
Notes: Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers | Affected: Flowise / Flowise | CVSS: 9.8 (CRITICAL) | EPSS: 0.65771 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers
Cve Id CVE-2025-8943
Vendor Flowise
Ghsa Id GHSA-2VV2-3X8X-4GV7
Product Flowise
Added Date 2026-08-05T08:45:39.489Z
Cvss Score 9.8
Epss Score 0.65771
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.99248
Used In Malware unknown
Vulnerability Id CVE-2025-8943
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-10-02 09:09 CEST | Updated: 2026-10-02 09:09 CEST
Show details on NVD website
To clipboard 

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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